/**
 * Copyright 2019 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {Pipe, PipeTransform} from '@angular/core';
import * as moment from 'moment';

/**
 * Converts a dates, strings, or timestamps without timezone information to UTC,
 * instead of using local time as the default.
 */
@Pipe({name: 'utc'})
export class UtcPipe implements PipeTransform {
  transform(date?: Date|string|number): Date|undefined {
    return date || date === 0 ? moment.utc(date).toDate() : undefined;
  }
}